Syllabus
* Seismic station Prague
History of the station; instaled seismographs; UK MFF stations in Greece; Czech seismic stations
* Seismographs
Priciple, types and parameters; transfer function (poles and zeroes); frequency and impulse response
* Seismograms
Reading of analog and digital records (program SCREAM), output formats (GCF, SAC, ASCII); Seismogram convolution and deconvolution, filtration, spectra, component rotation, phase polarization (program PITSA)
* Wave kinematics
The models of the medium: planar and spherical (JB, IASP91), velocity-depth gradients and discontinuities; body main and supplementary wave phases, epicentral distance, travel-time curves (program TTIME), azimuth; Wiechert-Herglotz method, Tau method; dispersion of surface waves
* Earthquake location
Global, regional and local networks; earthquake position, origin time and depth; linearisation of the problem, Geiger's method, program HYPO, Master event method, grid search
* Wave dynamics
Earthquake intensity; magnitude; scalar seismic moment; corner frequency
* Seismic source
Focal mechanism (first motion polarities, amplitude spectra and polarities - program ASPO); Apparent source time function; empirical Green's funtions
* Data centers and Internet
National Earthquake Information Center; International Seismological Center; Observatories and Research Facilities for European Seismology; Swiss Seismological Service
* Literature:
- B. Bolt, Earthquakes, W.H. Freeman and Company, San Francisco 1978.
- O. Kulhánek, Anatomy of Seismograms, Elsevier 1990.
- F. Scherbaum, Basic Concepts in Digital Signal Processing for Seismologists, Springer-Verlag, 1994.
- http://wwwneic.cr.usgs.gov
- http://orfeus.knmi.nl
- http://seis30.karlov.mff.cuni.cz
Annotation
Introduction into seismographs theory; seismograms processing; seismic stations network; earhquake location and mechanism.